CVE-2021-28363
on pypi
on github
Published
Severity
CVSS v3:
6.5 MEDIUM
CVSS v2:
6.4 MEDIUM
Description
The urllib3 library 1.26.x before 1.26.4 for Python omits SSL certificate validation in some cases involving HTTPS to HTTPS proxies. The initial connection to the HTTPS proxy (if an SSLContext isn't given via proxy_config) doesn't verify the hostname of the certificate. This means certificates for different servers that still validate properly with the default urllib3 SSLContext will be silently accepted.
References
- https://github.com/urllib3/urllib3/commits/main
- https://pypi.org/project/urllib3/1.26.4/
- https://github.com/urllib3/urllib3/commit/8d65ea1ecf6e2cdc27d42124e587c1b83a3118b0
- https://github.com/urllib3/urllib3/security/advisories/GHSA-5phf-pp7p-vc2r
- https://lists.fedoraproject.org/archives/list/[email protected]/message/4S65ZQVZ2ODGB52IC7VJDBUK4M5INCXL/
- https://security.gentoo.org/glsa/202107-36
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://security.gentoo.org/glsa/202305-02
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4S65ZQVZ2ODGB52IC7VJDBUK4M5INCXL/
Configurations
| CPE23 | Version Start | Version End | Exact Version |
|---|---|---|---|
| cpe:2.3:a:python:urllib3:*:*:*:*:*:*:*:* | 1.26.0 (including) | 1.26.4 | * |
| cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | n/a | n/a | 34 |
| cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.59:*:*:*:*:*:*:* | n/a | n/a | 8.59 |